The film was announced in October 2014 with Snyder on board to direct and Terrio attached to write the script. Initially announced as Justice League Part One, with a second part to follow in 2019, the second film was indefinitely delayed to accommodate a standalone Batman film with Affleck. Principal photographycommenced in April 2016 and ended in October 2016. Snyder then hired Joss Whedon to write scenes that would be filmed during reshoots; however, Snyder left the project in May 2017 following the death of his daughter. Whedon was hired to oversee the remainder of post-production, including directing additional scenes written by himself. Snyder received sole director credit for the film, with Whedon receiving a screenplay credit.

With an estimated production budget of $300 million, it is one of the most expensive films ever made. Justice League premiered in Beijing on October 26, 2017, and was released in the United States in 2D, 3D, and IMAX on November 17, 2017. It has grossed over $296 million worldwide and received mixed reviews from critics; the action sequences and performances (particularly Gadot and Miller) were praised while the thin plot, weak villain, and overuse of CGI were criticized. The film’s tone was met with a polarized reception, with some praising it for being lighter than previous DCEU installments, while others noted it as inconsistent.